Weather in St. Peter, Illinois
Live weather conditions. Source: Open-Meteo
Updated May 24, 2026 · 04:58 PM ET · Refreshes every hour
76°F
Partly cloudy
Feels like 79°F
65%
Humidity
5 mph
Wind Speed
About Weather in St. Peter
St. Peter is located in Illinois (coordinates: 38.867559°N, 88.850386°W). Weather data is sourced from Open-Meteo, a free and open meteorological API using data from national weather services including NOAA.
All temperatures are displayed in Fahrenheit. Wind speed is in miles per hour.